Rain-, wind-, and touch-induced expression of calmodulin and calmodulin-related genes in Arabidopsis.
In response to water spray, subirrigation, wind, touch, wounding, or darkness, Arabidopsis regulates the expression of at least four touch-induced (TCH) genes. Ten to thirty minutes after stimulation, mRNA levels increase up to 100-fold. Arabidopsis plants stimulated by touch develop shorter petioles and bolts. This developmental response is known as thigmomorphogenesis. TCH 1 cDNA encodes the putative Arabidopsis calmodulin differing in one amino acid from wheat calmodulin. Sequenced regions of TCH 2 and TCH 3 contain 44% and 70% amino acid identities to calmodulin, respectively. The regulation of this calmodulin-related gene family in Arabidopsis suggests that calcium ions and calmodulin are involved in transduction of signals from the environment, enabling plants to sense and respond to environmental changes.
Braam
J
J
Department of Biochemistry, Beckman Center, Stanford University, California 94305.
Davis
R W
RW
D000392:Air Movements; D000595:Amino Acid Sequence; D002147:Calmodulin / Q000235:genetics* / Q000502:physiology; D005786:Gene Expression Regulation; D006801:Humans; D008969:Molecular Sequence Data; D009024:Morphogenesis; D010812:Physical Stimulation; D063245:Plant Development; D010944:Plants / Q000235:genetics; D011891:Rain; D014110:Touch; D014887:Weather; D014919:Wind
D002147:Calmodulin